US11707062B2 - Formulation of stearyl alcohol - Google Patents

Formulation of stearyl alcohol Download PDF

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US11707062B2
US11707062B2 US16/494,873 US201816494873A US11707062B2 US 11707062 B2 US11707062 B2 US 11707062B2 US 201816494873 A US201816494873 A US 201816494873A US 11707062 B2 US11707062 B2 US 11707062B2
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composition
plant
stearyl alcohol
potato
parsley
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US20200100495A1 (en
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Pankaj Pathak
Louis Boddy
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Pro Farm Group Inc
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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N31/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic oxygen or sulfur compounds
    • A01N31/02—Acyclic compounds
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N3/00—Preservation of plants or parts thereof, e.g. inhibiting evaporation, improvement of the appearance of leaves or protection against physical influences such as UV radiation using chemical compositions; Grafting wax
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G7/00—Botany in general
    • A01G7/06—Treatment of growing trees or plants, e.g. for preventing decay of wood, for tingeing flowers or wood, for prolonging the life of plants
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests

Definitions

  • the present invention relates in general to the field of new formulation of a mono-alcohol having (a) 12 to 19 carbon atoms or (b) 20 to 30 carbon atoms, and its new method of uses in plants thereof.
  • composition of stearyl alcohol and its method of use in plant growth promotion are known in the art. See, for example, U.S. Pat. Nos. 6,489,269 B1, 6,884,759 B2, 7,585,814 B2, and 7,718,571 B2, all of which are incorporated in reference in their entirety. More particularly, the various structures of stearyl alcohol, its methods of use are incorporated in reference.
  • the present disclosure contemplates on a new formulation of stearyl alcohol that has surprising efficacy.
  • the present disclosure relates to a composition
  • a composition comprising (a) about 10% of a mono-alcohol having 12 to 24 carbon atoms, (b) about 0.1% of Antifoam OR-90, (c) about 2% of Soprophor BSU, (d) about 5% of Propylene Glycol, (d) about 0.5% of Potassium sorbate, (e) about 0.5% of Sodium benzoate, (f) about 0.1% of Xanthan gum, and (g) about 1% of Borresperse 3A.
  • This is called embodiment 1.
  • a composition comprising a mono-alcohol having (a) 12 to 19 carbon atoms, (b) 20 to 30 carbon atoms, (c) about 0.1% of Antifoam OR-90, (d) about 2% of Soprophor BSU, (e) about 5% of Propylene Glycol, (f) about 0.5% of Potassium sorbate, (g) about 0.5% of Sodium benzoate, (h) about 0.1% of Xanthan gum, and (i) about 1% of Borresperse 3A is contemplated.
  • composition of embodiments 1-2 further comprising a sun blocking reagent, fertilizer, insecticide, or fungicide. This is embodiment 3.
  • a method to reduce sun burn effects on a plant and/or fruit comprising applying an effective amount of the embodiments 1-3, wherein said plant and/or fruit has reduced sun burn effect is contemplated.
  • the present disclosure relates to a method to increase water retention in a plant and/or fruit comprising applying an effective amount of the composition of embodiments 1-3, wherein said plant and/or fruit has increased water retention.
  • various advantages of the new formulations of embodiment 1-3 are contemplated, these include, but are not limited to the fact that the new formulation can decreases the proportion of light transmitted through the plant cuticle, can lead to reduced plant leaf temperatures, can decrease transpiration around periods of heat stress, can increase plant yield, and/or can protects plants/fruits from solar radiation damage.
  • FIG. 1 denotes almond total yield versus different concentration of the new formulation (“SC-P”).
  • SC-P applied 3 times resulted in a statistically higher yield compared to all other treatments & to untreated control (“UTC”). From these results, it appears that less is better, & that earlier timings have a greater benefit in almond.
  • FIG. 2 denotes % of sunburnt walnut versus SC-P formulation concentration. All products reduced % sunburnt walnuts statistically superior to the UTC. SC-P performed statistically similarly to the standard.
  • FIG. 3 denote the number of apple without sunburn injury.
  • the % of fruit without sunburn injury was numerically highest in the plots treated with SC-P 0.6% v/v & the Raynox standard.
  • FIG. 4 denotes almond yield using the F25 formulation.
  • Treatment timings full bloom & 2 weeks post-full bloom.
  • Foliar 100 gallons per acre.
  • Yield assessments measured as total nut weight in lb/tree; data collected 8/14 Large-plot, non-replicated study; no statistical analysis. Negligible differences observed between UTC & all treatments for color, sunburn, vigor, flush, yield, & quality ratings. Treatments included 1 pt Regulaid/100 Gal.
  • FIG. 6 denotes walnut plant health using the F25 formulation. No statistically significant differences in yield, % marketable & unmarketable nuts, incidence of lobe shrivel, or incidence & severity of sunburn were observed between UTC, standard or F25 materials for any assessment date.
  • FIG. 7 denotes walnut yield using the F25 formulation.
  • UTC, standard, & high rate of MBI-505 were statistically similar for Tons nuts/Acre. No statistically significant differences observed between UTC & all treatments for sunburn, nut meat coloration, nut crackout, average nut weight, & average nut size during any assessment.
  • FIG. 8 denotes percent light transmission (% T) of wavelengths between 200 and 750 nm.
  • UV-B radiation occurs at 280-315 nm (dashed green lines), while photosynthetically active radiation occurs between 400-700 nm (solid green lines).
  • the rows of symbols correspond to 12 mL/L concentrations of formulated stearyl alcohol (triangles) and two alternate formulations (squares, diamonds). Water (circles) results in 100% light transmittance.
  • FIG. 9 denotes a comparison of the temperature depression caused by stearyl alcohol application to leaves. Points represent temperatures measured at 9 time intervals on four pairs of leaves.
  • FIG. 10 denotes a comparison of photosynthetic capacity of treated leaves, control leaves and leaves prior to stearyl alcohol application.
  • Photosynthetic capacity variation is interpreted as a treatment having higher/lower photosynthesis values than the control for the same stomatal conductance
  • FIG. 11 denotes mean transpiration rates of tomato plants treated with stearyl alcohol at 72 hours after application. Bars represent standard errors.
  • FIG. 12 denotes increase in almond yields after treatment with three applications of stearyl alcohol. Applications were made at full bloom (A), 14 days after full bloom (B), June drop (C), 14 days after June drop (D), and hull split (E). Experiment-wide means separations were conducted at 90% confidence using a Fisher LSD.
  • FIG. 15 denotes phytotoxicity of prototype stearyl alcohol formulations on corn.
  • the dotted black line represents the severity of phytotoxicity (desiccated leaf tips) observed in the untreated control.
  • SC-P formulation include (a) at least about 10% stearyl alcohol, (b) at least about 0.1% of Antifoam OR-90, (c) at least about 2% of Soprophor BSU, (d) at least about 5% of Propylene Glycol, (e) at least about 0.5% of Potassium sorbate, (f) at least about 0.5% of Sodium benzoate, (g) at least about 0.1% of Xanthan gum, and (h) at least about 1% of Borresperse 3A. Unless otherwise indicated, all examples and figures were conducted using the SC-P formulation.
  • F25 formulation include (a) at least about 10% stearyl alcohol, (b) at least about 30% Isopropyl myristate, (c) at least about 5% Tween 20, (d) at least about 2% Span80, (e) at least about 18% 1-Hexanol, and (d) at least about 35% water.
  • MMI-505 stands for a composition having stearyl alcohol as the active ingredient.
  • stearyl alcohol means from 8-12% of stearyl alcohol.
  • the active ingredient of the present disclose include the following formula (1):
  • R1 represents a C10 to C22 hydrocarbon group
  • R2 represents a hydrogen atom, a hydroxyl group or a C1 to C24 hydrocarbon group
  • R3 represents a hydrogen atom or a C1 to C24 hydrocarbon group
  • the hydrocarbon groups represented by R1, R2 and R3 may be respectively saturated or unsaturated groups, preferably saturated groups, and may be linear, branched or cyclic chains, preferably linear or branched chains, particularly preferably linear chains.
  • the number of total carbons in the hydrocarbon group can be either an odd number or an even number, preferably an even number.
  • the number of total carbons in R1, R2 or R3 is preferably 50 or less, more preferably 12 to 48, still more preferably 16 to 44.
  • the number of carbons in R 1 is preferably 14 to 22, more preferably 14 to 20, still more preferably 14 to 18.
  • the number of total carbons in the compound represented by the general formula (1) is preferably 12 to 48, more preferably 16 to 28, still more preferably 16 to 24.
  • the compound is more preferably a compound containing 12 to 24 carbons in total and having one hydroxyl group, still more preferably a compound containing 16 to 22 carbons in total and having one hydroxyl group.
  • the general formula (1) which is also known as stearyl alcohol, is a plant antitranspirant and sun damage protectant that can be extracted from coconut palms.
  • Stearyl alcohol is a natural precursor to certain leaf cuticle.
  • the cuticle is a hydrophobic multi-layered structure that resides on the outer surface of aerial plant epidermal cells. Plants employ leaf cuticles to limit water loss from non-stomatal plant surfaces and to protect aerial plant organs from pathogens, herbivores, mechanical damage or excess radiation culminating in damage to cell membranes and chlorophyll.
  • Cuticle waxes protect against photoinhibition of photosynthesis by increasing reflectance of light in the visible and infrared spectra; this leads to reduced transpiration rates and consequently increased leaf water-use efficiency.
  • most transpiration is conducted through stomatal pores which are typically concentrated on the underside of the leaf.
  • the cuticle structure may be modified to further reduce water loss from the epidermis. As an exception to this, cuticular transpiration tends to be higher in young ripening fruit.
  • Transpiration dissipates excess heat through evaporative cooling; the hotter the leaf temperature, the more water must be expended for this purpose, which can jeopardize long-term crop vitality in areas prone to soil water stress.
  • Photosynthesis demands that some amount of water loss inevitably occurs, in order for carbon dioxide to enter the leaf via open stomata; however under warmer temperatures the saturation water vapor concentration of ambient air increases, forcing leaf cells to transpire more water than necessary in order to equilibrate. The warmer the air temperature, the longer stomata must remain open, and the greater the amount of water that is lost from the leaf.
  • leaves with lower internal temperatures do not need to transpire as much as those with higher temperatures and can thus conserve more of their limited supply of water for allocation to photosynthesis, and thereby to biomass accumulation.
  • Leaf expansion is particularly sensitive to minor internal water deficits; thus avoiding such deficits allows for the production of larger leaves which in turn redounds to greater production of photosynthates for harvestable plant components.
  • reducing internal temperature can bring leaves closer to optimum temperature levels for photosynthesis. This is because high temperatures can adversely affect various processes related to photosynthesis, including activation of the key enzyme rubisco, membranebound phases of the electron transport chain, and energy allocated to photorespiration. Maintaining temperatures below 35° C.
  • Sunburn can occur when incoming light radiation surpasses the capacity of the xanthophyll cycle to dissipate excess light energy. Radiation from wavelengths outside the photosynthetic range, such as UV-B (315-280 nm), can be particularly harmful to plant tissue and growth.
  • UV-B radiation is the highest energy component of the daylight spectrum and has been shown to cause reductions in plant height and leaf area; leaf curling, bronzing, glazing or chlorosis; delayed flowering and fruit ripening; degradation of photosynthetic proteins; destruction of chlorophyll and carotenoids; reduction of activity of the key photosynthetic enzyme rubisco; and generation of reactive oxygen species that damage lipids, proteins and DNA; increases in UV-B radiation have also been shown to increase cuticle thickness, indicating increased plant resource allocation to protective structures rather than to harvestable material. Further, UV-B radiation is thought to be a driving cause of sunburn browning damage to fruits such as apples when ambient temperatures exceed 35° C.
  • UV-B radiation is particularly harmful to older leaves and to plants growing at low latitudes and high altitudes.
  • the adverse effects of UV-B can be exacerbated in the presence of other environmental stressors like water deficit.
  • the relationship between heat and UV-B is unclear but evidence that cuticle structures are weakened under high temperatures suggest increased plant sensitivity when these two stressors are combined.
  • stearyl alcohol enhances the action of the plant cuticle by decreasing the proportion of light transmitted into the leaf or other aerial plant organ, particularly in the UV-B range; reduces in incoming light radiation lowers leaf temperatures; decreases temperatures lead to reduced water loss from transpiration; thereby allowing plants treated to use conserved water for photosynthesis, increases water use efficiency, biomass accumulation and yields.
  • Application of stearyl alcohol also results in reduced damage from excessive exposure to UV-B radiation. In other words, by reflecting excess solar radiation, stearyl alcohol lowers leaf temperatures to reduce the effects of heat and of water deficits, and protects plant surfaces from the deleterious effects of UV-B.
  • the present disclosure also discloses at least two formulations of stearyl alcohol.
  • One is called F25 and the other is called SC-P.
  • the SC-P exhibits superior and surprising strong efficacy to improve sun burn effects and/or water retention while the concentration of the stearyl alcohol remains constant. This was surprising and unexpected because the change in formulation should only change the solubility of the stearyl alcohol. However, the present disclosure shows that when solubility is similar, the efficacy increased unexpectedly while the active ingredient stays constant.
  • the fruit/vegetable as the subject of the present disclosure includes, but are not limited to: grape, cucumber, pumpkin, watermelon, melon, potato, tomato, eggplant, green pepper, strawberry, okra, string bean, broad bean, pea, soybean, corn, grapes, citrus, almond, walnut or apple.
  • the plants and/or fruits can be cucumber, pumpkin, watermelon, melon, tomato, eggplant, green pepper, strawberry, okra, string bean, broad bean, pea, green soybean or corn; leaf vegetables such as Chinese cabbage, greens to be pickled, pakchoi, cabbage, cauliflower, broccoli, Brussels sprouts, onion, Welsh onion, garlic, shallot, leek, asparagus, lettuce, leaf lettuce, celery, spinach, garland chrysanthemum, parsley, wild chervil, Japanese parsley, udo, Japanese ginger, butterbur or beef-steak plant; and root vegetables such as radish, turnip, burdock, carrot, potato, taro, sweet potato, yam, ginger or lotus root.
  • the plant-activating agent can also be used for rice plants, wheat plants, and flowering plants.
  • Stearyl alcohol decreases the proportion of light transmitted through the cuticle.
  • stearyl alcohol reduces transmission of light radiation, particularly within the UV-B spectrum
  • percent (%) transmittance were measured using a spectrophotometer.
  • stearyl alcohol was diluted to 1/100th of the field application rate (6 mL/L active ingredient) for both visible and non-visible UV light spectra.
  • Visible light spectral analysis was conducted using a 96 well plate while UV transparent cuvettes and 96 well plates were utilized to analyze the percent light transmittance at the UV spectrum.
  • both a water reference and plate blank were used to calibrate the ratio of light energy transmitted through the formulation samples to the energy transmitted through the reference blank. Treatments were replicated three times.
  • stearyl alcohol Across all wavelengths, stearyl alcohol reduced the amount of transmitted radiation ( FIG. 8 ). Depending on the concentration of material applied, stearyl alcohol resulted in 20-50% reductions of transmitted UV-B radiation, and 10-15% reductions of light in the photosynthetically active radiation spectrum (400-700 nm). Thus stearyl alcohol blocks a greater proportion of harmful UV-B radiation compared with photosynthetically active radiation.
  • stearyl alcohol reduces internal leaf temperatures while not adversely affecting photosynthesis
  • stearyl alcohol was applied to eight attached soybean leaves selected from plants growing in a field.
  • the leaves were spaced in blocks so that two leaves could be compared to each other as control/treatment pairs.
  • the leaves were placed in fishing line, wood and metal holders that restrained the leaves in an exposed and horizontal orientation (to prevent leaf orientation changes affecting the leaf energy balance and temperature).
  • Leaf temperature was measured with an IR thermometer three times before and six times after application of a 1% v/v DI water solution of stearyl alcohol to the upper leaf surface, applied using a household spray bottle. Full coverage of the leaf surface was achieved and excess water shaken off. Leaves were dry within half an hour.
  • Treated leaves had higher leaf temperatures than control leaves prior to treatment, but similar values post treatment ( FIG. 9 ).
  • the apparent depression in leaf temperatures after application of stearyl alcohol was 1.5 degree C. (SE ⁇ 0.31), and was significant (P-value ⁇ 0.02; paired t-test using four replicates calculated as the average of each leaf measurement on a leaf before or after the treatment). This supports the hypothesis that stearyl alcohol reflects heat.
  • Photosynthetic rates were similar between all treatments, once variation in stomatal conductance was accounted for ( FIG. 10 ), with the treated leaves being marginally higher than the controls.
  • a lack of photosynthetic effect also suggests that the abaxial stomata are not occluded by the compound. Thus the compound should have no negative effect on radiation use efficiency or yield at the concentration used here.
  • Stearyl alcohol decreases transpiration around periods of heat stress.
  • a controlled lab bioassay was run to evaluate the ability of stearyl alcohol to decrease transpiration of tomato plants under moderate heat stress.
  • stearyl alcohol was applied at a 6 mL/L concentration in water to five tomato plants at the 6-8 leaf stage growing in 8.9 cm square pots, using a research track sprayer.
  • Sombrero a commercially available calcium carbonate plant sunscreen product, was applied as a positive control and deionized water as a negative control. The application rate was equivalent to 150 liters of diluted product per acre.
  • the mean transpiration rate of tomatoes ( FIG. 11 ) was greatest in the untreated control replicates (6.68 ⁇ g/cm2/sec), while stearyl alcohol (5.33 ⁇ g/cm2/sec) and Sombrero (5.34 ⁇ g/cm2/sec) achieved comparable reductions in transpiration of about 20%.
  • leaf transpiration was shown to decrease with application of stearyl alcohol in a relatively short span of time.
  • These reductions in transpiration were accompanied by average reductions in leaf temperature of 1.08 ( ⁇ 1.13) ° C. for Sombrero and 1.50 ( ⁇ 0.35) ° C. for stearyl alcohol.
  • a correlation is shown between lower temperatures and reduced transpiration after application of stearyl alcohol.
  • Stearyl alcohol was applied at a rate of 6 mL/L in a 379 liter (100 gallon) per acre tank solution with rates in volume of product/volume of carrier volume.
  • a kaolin clay product was applied as a positive control across three application timings, according to the label rate of 50 lbs per acre.
  • Applications were made on three to five occasions: at full bloom, 14 days after full bloom, June drop, 14 days after June drop, and hull split. Treatments were applied with an airblast sprayer and replicated on three plots. Almonds were harvested.
  • stearyl alcohol was applied by Duarte and Associates in established Chilean vineyards planted with wine (Merlot) and table (Princess) grape varieties. Plants were treated in 2014 with 3, 6 or 9 mL/L in 100 L of water when berries reached 11 mm in diameter and at two week intervals over the subsequent six weeks. Five contiguous vines were sprayed per treatment; treatments were replicated 3 times and arranged in a random complete block design. At harvest, bunches were counted per plant, yields assessed, sugar content measured and solar radiation damage rated. Plants treated with stearyl alcohol produced fewer damaged bunches, in both wine ( FIG. 13 ) and table ( FIG. 14 ) grape varieties. Reduced damage would appear to suggest that excess UVB rays are being blocked and that under certain conditions stearyl alcohol might therefore be applied to guard against sunburn or other forms of damage from excess solar radiation
  • Prototypes were first tested on corn and subsequently on flowers. Plants were grown in a greenhouse and were about 2 weeks old at the time of testing, reaching the 4-5 leaf stage by 7 days after the first treatment. Plants were treated on January 26 and again on February 1, evaluations were made 7 days after the first treatment. On the day of treatment, 100 ml aqueous solutions were prepared for concentrations of 6, 12 and 18 ml/L or 0.6, 1.2 and 1.8% v/v of each prototype formulation. Solutions were delivered to plants at a volume of 40 GPA using a research track sprayer fitted with an 8002 nozzle. Deionized water was applied as a negative control. There were three replicates per treatment. Plants were transferred back to the greenhouse after treatment.
  • Phytotoxicity was evaluated as percent damage, with 100% equaling complete plant death.
  • the symptoms observed in corn were burned (desiccated or necrotic) leaf tips. As burned tips are, to some degree, a common phenomenon in corn, some limited baseline damage was also detected in the untreated control plants. However, certain treatments greatly increased observed phytotoxicity, with the burning extending several inches beyond the extreme tip of the leaf. In the most damaged leaves, crinkling or stunted unfolding of the leaf was observed below the burned zone.
  • the most phytotoxic prototype formulations were SC-A and ME. In contrast, formulation SC-P showed fewer symptoms, and thus appeared healthier, than the untreated control. See FIG. 15 for details. Again, the fact that different formulations of stearyl alcohol exhibited different phytotoxicity profile was surprising and unexpected since the active ingredient concentration stayed the same.
  • compositions of the invention can be used to achieve methods of the invention.
  • the words “comprising” (and any form of comprising, such as “comprise” and “comprises”), “having” (and any form of having, such as “have” and “has”), “including” (and any form of including, such as “includes” and “include”) or “containing” (and any form of containing, such as “contains” and “contain”) are inclusive or open-ended and do not exclude additional, unrecited elements or method steps.
  • A, B, C, or combinations thereof refers to all permutations and combinations of the listed items preceding the term.
  • “A, B, C, or combinations thereof” is intended to include at least one of: A, B, C, AB, AC, BC, or ABC, and if order is important in a particular context, also BA, CA, CB, CBA, BCA, ACB, BAC, or CAB.
  • expressly included are combinations that contain repeats of one or more item or term, such as BB, AAA, AB, BBC, AAABCCCC, CBBAAA, CABABB, and so forth.
  • BB BB
  • AAA AAA
  • AB BBC
  • AAABCCCCCC CBBAAA
  • CABABB CABABB
  • compositions and/or methods disclosed and claimed herein can be made and executed without undue experimentation in light of the present disclosure. While the compositions and methods of this invention have been described in terms of preferred embodiments, it will be apparent to those of skill in the art that variations may be applied to the compositions and/or methods and in the steps or in the sequence of steps of the method described herein without departing from the concept, spirit and scope of the invention. All such similar substitutes and modifications apparent to those skilled in the art are deemed to be within the spirit, scope and concept of the invention as defined by the appended claims.

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